Solve for a
a=\frac{3}{5}=0.6
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10a=6
Combine 3a and 7a to get 10a.
a=\frac{6}{10}
Divide both sides by 10.
a=\frac{3}{5}
Reduce the fraction \frac{6}{10} to lowest terms by extracting and canceling out 2.
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